More circular logic. Someone that administers the state is by definition no longer working class.
And if you abolish the typical liberal capitalist ways of wealth accumulation, then the data and ways of measuring such stops making sense, but this doesn't change the fact that the people at the top of these states comandeered vast wealth and used that for their personal benefit and pet projects. And this is also a typical characteristic of state-capitalism where the people in charge are typically living a quite low profile life outside their public persona a few cultivate for vain reasons.
And yes there was some political disagreement at the time in Germany, which also had gone though significant political upheaval recently, but to allow someone to go that you know is in favour of establishing a capitalist state when you dislike the alternative is sure sowing chaos or you could also say they wished for a counter-revolution to take place, which they got through the hands of Lenin.